Chuck for hand tools



March 27, 1928. 1,664,236

A. WCKNER CHUCK FOR HAND Toons Filed Nov. l5. 1924 Patented Mar. 27, 1928.

UNITED STATES PAT-ENT oFFicE.

AXEL WICKNER, OF CHICAGO, ILLINOIS. Y

yCHUCK FOR HAND TOOLS.

Application filed November 15, 1924. Serial No. 750,164.

f pended claim and illustrated in the accompanying drawings which form a part of this application and in which Fig. l is a view in elevation of a chuck embodying one form of the invention.

Fig. 2 isV a longitudinal sectional view through the chuck and is taken on line 2-2 of F ig. l.

Fig. 3 is a cross section through the chuck and is taken on line 3 3 of Fig. 2.

Fig. 4 is a longit-udinal sectional view through Fig. 3.

Like. reference characters denote corresponding parts throughout the several views.

T he reference numeral 'l denotes the body of the chuck which is integral with the shank 2 that is formed with the notch 3a to permit its operative engagement with the socketof the tool to which it is applied, said body being threaded peripherally to receive the interiorly threaded sleeve 3 which is formed with the knurled portion 4.

The sleeve 3 is tapered at one end and formed with' the jaw opening 5 through which the jaws 6, two in number, extend; said jaws carrying the drill 7 0i' other tool with which they may be provided. The jaws G at their tool-carrying end are beveled to contorni to the shape of the end of the sleeve 3 and are formed with aligned recesses or grooves 8 to receive the tool. The jaws are further formed with oppositely disposed rccesses 9 to receive the ends of the F connecting spring 10 that tends yieldingly to force the jaws apart.

Referring now to Figsl, 2, 3 and 4 the jaws 6 at their inner ends are recessed along their adjacent faces to receive the extension 11 integral with the body l which extension is perforated for passage therethrough of the said spring l0 which thereby connects said extension and the jaws, the body l being recessed about the extension l1 to afford clearance for the inner ends of the jawsf. The jaws 6 are formed at their inner ends with a surface. recess 12 for the annular spring 13 which tends to bring the inner ends of the jaws together against the said extension l1. This construction provides a compact chuck that operates as a unit and is readily assembled Vor taken apart when l desired.

The spring 10 is housed in the recess 9 and bears at its ends against the inner surfaces of the jaws 6 and is under v.tension witha. tendency to force thel jaws away from `each other. The annular band spring 13v circumscribes the jaws alonga line lying between the inner ends of the jaws and the'spring l0 and the said spring 13 is under tension with a tendency to hold the inner surfaces of the inner end portions of the jaws is cont-act with the surface of the conical extension l1 'when the tool pin 7 should not interpose between the jaws. Thus, means are provided for holding the jaws in position with relation to the extension so that tool bits of dif ferent diameters may be readily inserted between the jaws and when the sleeve is tightened upon the body, the tool bit which is inserted between the'jaws is firmly clamped between them.

v Vhat is claimed is A chuck comprising a threaded body having a frusto conical extension formed integrally therewith and provided with a transversely disposed recess, a sleeve engaging the thread of the body and housing said eXtension, jaws 'disposed at opposite sides` of the and bearing against the inner surfaces of the jaws and a. band spring circumscribing the jaws around a line lying between the inner ends `of thev jaws and the tirst-mentioned spring. i

In testimony that I claim the foregoing as my `own I have hereto affixed my signature.

AXEL WICKNER. 

